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GB/T 35186-2025Performance evaluation of measuring system for natural gas (English PDF)

天然气计量系统性能评价

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Issued by

SAMR; SAC

Level / Type

National · Recommended

Issue date

October 5, 2025

Implementation date

May 1, 2026

Scope

GB/T 35186-2025 is the English-translated version of 天然气计量系统性能评价.

GB/T 35186-2025 is the Chinese standard "Performance evaluation of measuring system for natural gas". Its scope clause reads: This document specifies the content, methods, procedures, and results of performance evaluation for natural gas metering systems.

This document applies to natural gas metering systems that conform to GB/T 18603.Other natural gas metering systems may refer to this document for further information.

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Document preview — GB/T 35186-2025

National Standard of the People's Republic of China

ICS: 75.180.30
Classification: E 98
Replacing: GB/T 35186-2017

Issued by: State Administration for Market Regulation; Standardization Administration of the PRC

Preface
1.Scope
2 Normative References
3.Terms and Definitions
4.Evaluation Content
4.1 Metering System Configuration
4.2 Flow rate, temperature and pressure measurement
4.3 Determination of physical property parameters
4.4 Measurement Management
4.5 Uncertainty
5.Evaluation
5.1 Evaluation Preparation
5.2 Evaluation of Metering System Configuration
5.3 Evaluation of Flow Rate, Temperature, and Pressure Measurements
5.4 Evaluation of physical property parameters
5.5 Evaluation of Metrological Management
5.6 Uncertainty Assessment
6.Evaluation Results
Appendix A (Informative) Example of a Metrological System Evaluation
Appendix B (Informative) Analysis of System Review Validation
Appendix C (Normative) Evaluation of Uncertainty in Measurement Systems
Appendix D (Informative) Example 26 of Uncertainty Assessment
Appendix E (Informative) Example 31 of a Measurement System Performance Evaluation Report
References

1 Scope

This document specifies the content, methods, procedures, and results of performance evaluation for natural gas metering systems.

This document applies to natural gas metering systems that conform to GB/T 18603.Other natural gas metering systems may refer to this document for further information.

2 Normative references

The contents of the following documents, through normative references within the text, constitute essential provisions of this document. Dated citations are not included.

For references to documents, only the version corresponding to that date applies to this document; for undated references, the latest version (including all amendments) applies.

document.

GB/T 11062 Calculation Methods for Calorific Value, Density, Relative Density and Wobbe Index of Natural Gas

GB/T 13609 Natural Gas Sampling Guidelines

GB/T 13610 Compositional Analysis of Natural Gas - Gas Chromatography

GB/T 17747 (all parts) Calculation of natural gas compressibility factor

GB/T 18603 Technical Requirements for Natural Gas Metering Systems

GB/T 18604 Measurement of Natural Gas Flow Rate Using Ultrasonic Gas Flow Meters

GB/T 21391 Measurement of Natural Gas Flow Rate Using a Gas Turbine Flow Meter

GB/T 21446 Measurement of Natural Gas Flow Rate Using a Standard Orifice Plate Flow Meter

GB/T 22723 Determination of Energy of Natural Gas

GB/T 27894 (all parts) Determination of composition of natural gas by gas chromatography and calculation of related uncertainties

GB/T 30490 Automatic Sampling Method for Natural Gas

GB/T 30491 (all parts) Calculation of thermodynamic properties of natural gas

GB/T 30500 Gas Ultrasonic Flow Meter In-Service Inspection - Sound Velocity Test Method

GB/T 34166 Measurement of natural gas flow rate using a standard nozzle flow meter

JJF1059.1 Evaluation and Expression of Measurement Uncertainty

JJF1183 Temperature Transmitter Calibration Specification

JJG229 Verification Procedure for Industrial Platinum and Copper Resistance Temperature Detectors

JJG633 Verification Procedure for Gas Positive Displacement Flow Meters

JJG640 Differential Pressure Flow Meter Verification Procedure

JJG700 Gas Chromatograph Verification Procedure

JJG882 Pressure Transmitter

JJG1003 Flow Totalizer Verification Procedure

JJG1030 Ultrasonic Flowmeter Verification Procedure

JJG1037 Verification Procedure for Turbine Flow Meters

JJG1038 Verification Procedure for Coriolis Mass Flow Meters

JJG1055 Online Gas Chromatograph Verification Procedure

JJG1121 Vortex Flow Meter

GB/T 23258 | GB/T 21447 | GB 50341 | GB/T 46423 | GB/T 21446 | […]

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This preview omits tables, figures, formulas and parts of the technical clauses. The complete document — 41 pages — is available in the English PDF.

Referenced standards

Normative references

GB/T 17747 · GB/T 27894 · GB/T 30491

Cited by

Editions of GB/T 35186

Edition	Title	Revision	Status
GB/T 35186-2025	Performance evaluation of measuring system for natural gas	current edition	Current
GB/T 35186-2017	Performance evaluation of measuring system for natural gas	previous edition	In force

This page sells the current edition, GB/T 35186-2025. Earlier editions are listed for reference only.

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